1SN9

An Oligomeric Domain-Swapped Beta-Beta-Alpha Mini-Protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray structure analysis of a designed oligomeric miniprotein reveals a discrete quaternary architecture

Ali, M.H.Peisach, E.Allen, K.N.Imperiali, B.

(2004) Proc.Natl.Acad.Sci.USA 101: 12183-12188

  • DOI: 10.1073/pnas.0401245101
  • Primary Citation of Related Structures:  1SNA, 1SNE

  • PubMed Abstract: 
  • The x-ray crystal structure of an oligomeric miniprotein has been determined to a 1.2-A resolution by means of multiwavelength anomalous diffraction phasing with selenomethionine analogs that retain the biophysical characteristics of the native pepti ...

    The x-ray crystal structure of an oligomeric miniprotein has been determined to a 1.2-A resolution by means of multiwavelength anomalous diffraction phasing with selenomethionine analogs that retain the biophysical characteristics of the native peptide. Peptide 1, comprising alpha and beta secondary structure elements with only 21 aa per monomer, associates as a discrete tetramer. The peptide adopts a previously uncharacterized quaternary structure in which alpha and beta components interact to form a tightly packed and well defined hydrophobic core. The structure provides insight into the origins of the unusual thermal stability of the oligomer. The miniprotein shares many characteristics of larger proteins, including cooperative folding, lack of 1-anilino-8-naphthalene sulfonate binding, and limited deuterium exchange, and possesses a buried surface area typical of native proteins.


    Organizational Affiliation

    Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
tetrameric beta-beta-alpha mini-protein
A, B, C, D
23N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  5 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A, B, C, D
NON-POLYMERH2 N

--

DBZ
Query on DBZ
A, B, C, D
L-PEPTIDE LINKINGC10 H12 N2 O3ALA
DPR
Query on DPR
A, B, C, D
D-PEPTIDE LINKINGC5 H9 N O2

--

DAL
Query on DAL
A, B, C, D
D-PEPTIDE LINKINGC3 H7 N O2

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ACE
Query on ACE
A, B, C, D
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.188 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 38.939α = 90.00
b = 56.172β = 90.00
c = 32.320γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
SHELXL-97refinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-08-17
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance